Question

If cos(40° + A) = sin 30°, determine A​

Answer 1

Qᴜᴇsᴛɪᴏɴ✯

If cos(40° + A) = sin 30°, determine A.

Sᴏʟᴜɪᴏɴ✯

cos (40 + x) = sin 30° = sin (90° – 60°)

⇒ cos (40° + x) = cos 60°

⇒ x = 20°.

Step-by-step explanation:

Hᴇɴᴄᴇ, ᴛʜᴇ ᴀɴsᴡᴇʀ ɪs x=20

Hᴏᴘᴇ ɪᴛ ʜᴇʟᴘs ʏᴏᴜ✌︎