4sin fifteen ×cos seventy five
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ʜᴇʏᴀ !!
ʜᴇʀᴇ's ʏᴏᴜʀ ᴀɴsᴡᴇʀ
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4 sɪɴ 15° × ᴄᴏs 75°
= 4 sɪɴ ( 90° - 75° ) × ᴄᴏs 75°
= 4 sᴇᴄ 75° × ᴄᴏs 75°
= 4 sᴇᴄ 75° × 1 / sᴇᴄ 75° [ • ᴡᴇ ᴋɴᴏᴡ , ᴄᴏs x = 1 / sᴇᴄ x ]
= 4
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ʜᴏᴘᴇ ɪᴛ ʜᴇʟᴘs ʏᴏᴜ ᴅᴇᴀʀ! :)
★ ᴅᴇᴠɪʟ ᴋɪɴɢ
ʜᴇʀᴇ's ʏᴏᴜʀ ᴀɴsᴡᴇʀ
____________________
4 sɪɴ 15° × ᴄᴏs 75°
= 4 sɪɴ ( 90° - 75° ) × ᴄᴏs 75°
= 4 sᴇᴄ 75° × ᴄᴏs 75°
= 4 sᴇᴄ 75° × 1 / sᴇᴄ 75° [ • ᴡᴇ ᴋɴᴏᴡ , ᴄᴏs x = 1 / sᴇᴄ x ]
= 4
_____________________
ʜᴏᴘᴇ ɪᴛ ʜᴇʟᴘs ʏᴏᴜ ᴅᴇᴀʀ! :)
★ ᴅᴇᴠɪʟ ᴋɪɴɢ
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