Question

1. Fill in the blanks:
a. Cos 20° = sin?
b. tan30°x tan?
= 1
c. Cos 40º = sin?
d. Sin (90 - 40) = cos?​

Answer 1

Answer:

Cos 20 = sin (90 - 20)

Sin 70

Tan 30 X tan 60 = 1

Cos 40 = sin 50

Sin 90-40 = cos 40