RD Sharma - Mathematics

Book: RD Sharma - Mathematics

Chapter: 7. Values of Trigonometric Functions at Sum of Difference of Angles

Subject: Maths - Class 11th

Q. No. 2 of MCQ

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2

Mark the correct alternative in the following:

If A + B + C = π, then sec A (cos B cos C – sin B sin C) is equal to


B+C=

TAKE BOTH SIDE COS


Cos (B+C)=cos(π-A)


(cos B cos C – sin B sin C) = -cos(A)


sec A (cos B cos C – sin B sin C) is equal to =-1

1

Chapter Exercises

Exercise 7.1
Exercise 7.2
Very Short Answer
MCQ

More Exercise Questions

1

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The value of is
2

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4

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5

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7

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8

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9

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10

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11

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12

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13

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14

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15

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16

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17

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18

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19

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20

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21

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22

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23

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