Question

20. Sin 42cos 48° + cos 42°. sin 48° T HH TM​

Answer 1

Answer:

1

Step-by-step explanation:

This is in the form of sin A cos B + cos A sin B which is equal to sin(A+B)

Here , A = 42 , B = 48

So , we get sin ( 42+48) = sin 90 = 1

Hope this helps

Answer 2

Answer:The value is 0

Step-by-step explanation:

as per the concept of complementary angle ,pair of T-function with complementary angle their values are equal so,

sin(90°-42°).cos48°+cos(90°-42°).sin48°

=cos48°.sin48°+sin48°.cos48°

=0