Question

Express sin 67° + cos 75° in terms of trigonometric ratios of angles between 0 and 45°
Trigonometric Identities
may recall that an equation is called an identity
it is true for all values of the variables involved.
arly. an equation involving trigonometric ratios
angle is called a trigonometric identity, if it is
or all values of the angle(s) involved.
In this section, we will prove one trigonometric
ity, and use it further to prove other useful
Fig. 8.22​

Answer 1

Answer:

as per sin(90-*)=0

sin67 +cos75

cos(90-67)+ sin(90-75)

cos 27+sin15

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